package org.apache.lucene.analysis;

/**
 * Copyright 2004 The Apache Software Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.io.IOException;

/**
 * Normalizes token text to lower case.
 *
 * @version $Id: LowerCaseFilter.java 150259 2004-03-29 22:48:07Z cutting $
 */
public final class LowerCaseFilter extends TokenFilter {
    public LowerCaseFilter(TokenStream in) {
        super(in);
    }

    public final Token next() throws IOException {
        Token t = input.next();

        if (t == null)
            return null;

        t.termText = t.termText.toLowerCase();

        return t;
    }
}
